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Rufina [12.5K]
2 years ago
8

Help me I really need help

Mathematics
1 answer:
Aleksandr [31]2 years ago
3 0

Answer:

Question 1 is A  (7/10) Question 2 is b (39/56)

Step-by-step explanation:

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Two gears in a machine are aligned by a mark drawn from the center of one gear to the center of the other. If the first gear has
Aleksandr [31]

Answer:

5

Step-by-step explanation:

for the first gear

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for the second gear

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1 / 40

2 / 80

3 / 120

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<em>the two marks will meet after 120 teeth, 5 revolutions of the first gear and 3 revolutions of the second.</em>

the way to get that amount of teeth is

24 = 2 \times 2 \times 2 \times 3 =  {2}^{3}  \times 3

40 = 2 \times 2 \times 2 \times 5 =   {2}^{3}  \times 5

the Least Common Multiple equals the product of all factors, but those factors who are repeted for both numbers should be only once.

{2}^{3} \times 5 \times 3 = 120

120 teeth are 5 revolutions for gear1 and 3 por gear2

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3 years ago
A store has a 40% off sale on headphones. With this discount, the price of one pair of headphones is $36.
Aloiza [94]

Answer:

21.6

Step-by-step explanation:

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2 years ago
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PIT_PIT [208]

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40%

Step-by-step explanation:

So 10/25=0.4

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alekssr [168]

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Step-by-step explanation:

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